<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>表单</title>
</head>
<body>
    <form action="" method="get">
        username <input type="text" id="username">
        psd <input type="text" id="psd">
        <!-- <input type="submit" value="提交"> -->
         <button type="submit">提交</button>
    </form>
    
</body>
</html>